Metal is the true cultural heritage of Scandinavia. Proof is the Arab merchant who visited 10th century Denmark and reported:
“Never before I have heard uglier songs than those of the Vikings in Slesvig (in Denmark). The growling sound coming from their throats reminds me of dogs howling, only more untamed.”
[This is the immediate source, though it seems to be one of those too-good-to-be-true quotations that floats round online]